Home / 28,190.72-38,902.40-15,444.16

Finding the Fourth Proportional to 28,190.72, 38,902.40 and 15,444.16

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Solution

The fourth proportional to 28,190.72, 38,902.40 and 15,444.16 is: 21,312.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,190.72 : 38,902.40 = 15,444.16 : x
  2. Step 2: Convert to fraction form
    28,190.72/38,902.40 = 15,444.16/x
  3. Step 3: Cross multiply
    28,190.72x = 38,902.40 × 15,444.16
  4. Step 4: Simplify right side
    28,190.72x = 600,814,889.98
  5. Step 5: Solve for x
    x = 600,814,889.98/28,190.72
  6. Step 6: Final answer
    x = 21,312.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.